Gas-projectile



F. H. AND W. H. LIVENS.

GAS PROJECTILE.

APPLICATION FILED JULY 2. 1919.

1,335,343. Patented Mar. 30, 1920.

mnwmd FREDERICK HOWARD LII/ENS MLLIAM HawARo LIVENS @351 Thu? flamma a UNIT sr FREDERICK HOWARD LIVENS, OF LINCOLN; AND WILLIAM HOWARD LIVENS, OF LONDON, ENGLAND.

GAS-PROJECTILE.

Specification of Letters Iacent.

Patented Mar. 30, 1920.

- Application filed July 2, 1919. Serial No. 308,237.

of the thimble has the least thickness of To all whom it may concern:

Be it known that we, FREDERICK HOWARD LIVENS, a subject of the King of Great Britain, residing at Sheaf Iron Works, Waterside'South, Lincoln, England, and WILLIAM HowARD LIVENS, a subject of the King of Great Britain, residing at 32 Howitt road,

Hampstead, London, England, have invented new and useful Improvements Relating to Gas-Projectiles, of which the following is a specification.

This invention relates to bombs, shells and like projectiles of the unrifled class, more particularly used for emitting lethal vapors, and has for its object the facilitating of the manufacture of the same by avoiding weldthickness, and in subsequent operations indenting the closed end and closing in its open end. The thickness of the walls obtained thus varies in accordance with the stresses which have to be borne resulting in a greater content for a given weight of projectile, whlle the integral construction permits the bursting charge to be displaced at will without presenting a passage for the escape of the contents of the projectile.

The accompanying drawing shows, by way of example, in axial section a bomb for emitting lethal vapors constructed according to the invention.

The finished bomb consists of a cylinder having'one closed end, the other end being left witha small hole. The closed end or nose is indented to form a container at which. is tapped and fitted with an adapter 6. The container (2 receives a bursting charge contained within a gain f. The small open end closed in. As will be observed the closed end metal, then the cylindrical Walls, while the open end I) has the greatest thickness of metal. The closed end of the thimble is then taken to other dies, and the nose pushed inward and drawn at the same time to form the container (1. The open end is now drawn together under swages or by dies into the semi-spherical shape illustrated to form the,

base of the projectile, which base can be twice the thickness of the cylindrical part, and so resist more efficiently the shock of the propellant.

As shown, the base end of the projectile is of substantially uniform thickness and merges into the cylindrical wall also of uniform but lesser thickness, while the nose end is the thinnest portion, the Wall forming the chamber for the bursting charge being more or less progressively thinner toward the inner e'nd.

The wall of the cylindrical part can, however, be made thicker next the base than next the nose end or thewhole projectile may be progressively thinner from the base to the nose.

The onlv machining which may be required is the turning of the base end to a more regular form.

By this construction no welding is necessary and a source of weakness and difficulty in bombs or shells to be charged with gas is consequently avoided.

Such proportionate thickness can be ob- I tained in the walls that the projectile will. stand a high propelling charge without setting up, and at the .same time a capacity such that measured by the weight of water held, this weight will be equal approximately to half the weight of the empty bomb.

The efiiciency of a gas projectile:

carrying capacity gross weight To increase the efi'iciency of the gas pros jectile either the carrying capacity, that is, the quantity of gas which it holds, may be increased or the gross weight of the projectile decreased. By constructing the projectile so that its wall is progressively thinner from the base to the nose and by elimination of joints between the container for the bursting charge and that for the gas, and by the further elimination of joints at each prior types end of the gas container characterizing gas shells, the carrying capacity is increased while the gross weight Is also decreased, thus effecting increased efiiciency of the gas projectile.

What we claim is:

1. A drawn, gas projectile having a struc-- other. a

3. A drawn, gas projectile having a struc- .ture which gives maximum efiiciency per quantity of metal therein and separatecompartments' :for holding lethal vapor and bursting charge, the walls of said compartments being integral with each other.

4. A drawn gasprojectile havin at its nose an indentation with relative y thin walls to provide a container or chamber for a bursting charge and having at its opposite end a closed-in portion, the walls of which are thicker than the walls of the body portion of the'projectile.

drawn gas projectile having integral.

base, body and nose portions, the nose having an 'findentation holding a bursting charge and the wall of said projectile bemg progressively thinner from the base to the nose.

6. In a drawn gas projectile havin integral base, bod and nose portions, a 0 amber containing ethal vapors and a separate -chamber formed by an indentation 1n the nose containing 5 bursting charge, the wall of said rojectile being of greatest thickness at the b nose;

7 In a drawn gas projectile having integral base, body and noseportions, a chamber containing lethal vapors and a separate chamber formed by an indentation 1n the nose containing a bursting charge, the wall of said projectile being progressively thinner from the base to the nose.

8. A process of making a drawn gas projectile, consisting of first cupping a circular metallic plate, then forming a thimble from the cufpped plate, then indenting the closed end 0 the thimble to provide a container or chamber fora bursting charge which has relatively thin walls, and then closing in the oppositeend of the thimble to form a base portion'with relatively thick walls as compared with the walls of the body and the indented end of the thimble.

9. A ,process for the manufacture of a drawn gas projectile from a single circular -metallic late which consists in bending the plate to orm a thimble, then indenting the closed end of the thimble to form a container or cup with relatively thin walls to contain a bursting charge, and then closing in the 0 en end ofthe thimble to form a base 'wit relatively thick walls as compared with the indented end and the body portion of the projectile.

In testimony that we claim the foregoing as our invention -we. have signd our names this 12th day of June, 1919.

FREDERICK HOWARD LIVENS. 'WILLIAM HOWARD LIVENS.

ase and of least thickness at the 

